You mean because the clock speed is rarely maxed? That's not really a big issue to be honest. A benchmark that fully loaded the CPU wouldn't tell you a lot because the device would be throttling within 10 seconds so wouldn't give you any indication of real usage at all.
my original thought was if the difference in benchmark scores between the note 3 exynos and the note 4 snapdragon is due to the cpu or the optimization of it, then at least it should show a bit of load on the cpu while performing the tasks.
the screenshot of blackbahamuts benchmark result (of his exynos note 4) is very telling. even on stock firmware he has many CPU spikes in certain parts of the benchmark. he has more than 15 cpu spikes some even for a longer period of time which indicated the cpu being under full load meaning the cpu is not fast enough to process all instructions and so it needs all the cpu clock speed to process it.
these spikes are not present in the snapdragon version. i have exactly one short cpu spike for the whole benchmark (without power saving activated) to put this into perspective.
so the exynos processor seems to be a bottleneck here actually.
this leads me to the conclusion that it is probably only the cpu gouvernor that is differently tweaked and much more lazy on the snapdragon, so the CPU will not even raise the speed up for this type of task. i am pretty sure that if you modify the cpu gouvernor and set it to raise the CPU speed instantly it will show similar results. since the benchmark is probably not even multi-threaded (since there is always only one task being done) the amount of cores should be irrelevant and in the end theoretically only the raw cpu clock speed should count, since exynos and snapdragon both use arm architecture with very similar if instruction sets.
back in the old days on the galaxy s2 i had a mod which allowed me to change the cpu governor settings on the fly. if there is such a mod already for the note 4 snapdragon it would be nice to let somebody run the benchmark with stock settings and then with a governor setting tweaked for full performance.
on the other hand it is also reasonable to assume that the benchmark only really makes use of less cpu power than is available on the snapdragon variant.
snapdragon variant has a top speed of 2.7 GHz and hits only one spike during the benchmark.
exynos has a top speed of 1.9 GHz and hits the 100% quite a lot. so the benchmark is probably giving the cpu hardly enough to do fill the pipe for a 2 GHz cpu.
all these observations just lead to the cpu not really being a big factor in the benchmark. in the end most of the time the storage speed is more important anyways, because todays RAM and CPUs are so fast you that you got trouble to get the data read from flash storage to the RAM in the first place and that is what delays the operation and not the cpu not having the power to process all the instructions you throw at it.
would be interesting to the see cpu graph for the note 3 versions actually. do they spike a lot ?
The guy above has exynos and 4.4.4 since it has 4G and not lte as symbol for LTE connection.
And yes lollipop has a issue with the gpu I guess, on antutu it gives more times half the gpu score as it should be. 7.5k instead of 15k+
N910C with polish lolipop stock